Combination slide bolt lock



Feb. 20, 1968 F. J. RUSSELL. ETAL 3,369,382

COMBINATION SLIDE BOLT LOCK INVENTORS.

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COMBINATION SLIDE BOLT LOCK Filed Jan. 1l, 1965 4 Sheets-Sheen?J 2 l 1H. A4716: 5/37 JM '19712;'

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Feb. 20, 1968 F. J. RUSSELL ETAL 3,369,382

COMBINATION SLIDE BOLT LOCK 4 Sheets-Sheet 5 Filed Jan. ll, 1965 Feb 20, 1968 F. J. RUSSELL ETAL 3,369,382

COMBINATION SLIDE BOLT LOCK Filed Jan. l1, 1965 4 Sheets-Sheet 4- /VEA/roR-S 14K/QED cl. RUSSEL@ 27 @goe QSOLQV/E/C.

United States Patent Gtitice 3,369,382 Patented Feb. 20, 1968 3,369,382 COMBINATION SLIDE BOLT LOCK Fred J. Russell, 8635 Otis St., South Gate, Calif. 90280, and George B. Solovieff, San Clemente, Calif.; said Solovieif assignor to said' Russell Filed Jan. 11, 1965, Ser. No. 424,541 13 Claims. (Cl. 70-156) ABSTRACT OF THE DISCLOSURE A slide bolt lock having a lock bolt movable between locking and unlocking positions by external means when the lock bolt is internally released and including both a combination lock mechanism and a key lock mechanism, either of which may independently release the lock bolt and further including means for readily changing the combination of the combination lock mechanism without disassembling the lock. The lock includes Scrambler means for the combination mechanism automatically operated by movement of the lock bolt to unlocking position.

This invention relates in general to combination locks, and more particularly to a bolt type lock incorporating both combination and key lock actuating mechanisms.

Slide bolt locks of the kind to which this application relates usually either employ lock bolts which move lengthwise between retracted and extended positions relative to the lock case, or they employ lock bolts which extend from the lock case a suitable fixed distance and are movable laterally for engagement with and disengagement from an external look detent or opposing retaining edge.

Such bolt type locks, as heretofore usually constructed, have not been suthciently secure and often were capable of being unlocked by exterior manipulation of the exposed bolt member. Furthermore, such bolt lock devices incorporating combination lock actuating mechanisms, and which were often used in quite large numbers for closely adjacent enclosures, such as for example clothes lockers and the like compartments, were quite limited in the number `of different combinations which could be employed, and in the facility with which such combinations could be changed. Moreover, such large numbers of bolt lock devices primarily operated by means of combination lock mechanisms, could not be quickly and conveniently operated by any single universally applicable means, such as where the locks are key-operated and a master key may be employed. Still further, bolt locks incorporating either combination or key-operated mechanisms were heretofore excessively complicated and time consuming and expensive to manufacture` It is accordingly a principal object of this invention to provide an improved blot lock mechanisms employing both combination and key-actuating mechanisms, by means of which the lock can be alternatively operated either by a combination lock mechanisms or by a key lock mechanism in which a master key may be used.

It is another object of this invention to furnish a bolt lock mechanism of improved strength and security.

It is another object of this invention to provide an improved combination operated, bolt-type lock mechanism.

It is still another object of this invention to provide `an improved key-actuated bolt lock mechanism.

It is still another object of this invention to provide a bolt lock mechanism of generally improved design, operating characteristics, and durability.

It is a further object of this invention toprovide a combination lock mechanism in which the combination thereof can be changed easily and quickly and without the necessity of disassembling the lock.

It is a still further object of this invention to provide a combination lock mechanism which includes externally operable means, by which the combination thereof can be changed easily and quickly from any known combination to any other selected combination.

These and other objects, advantages, and features of novelty will be evident hereinafter.

In the drawings, which illustrate a presently preferred embodiment of the invention, and in which the same or similar reference characters designate the same or similar 'parts throughout the several views:

FIGURE l is a front elevational view of the lock assembly, with the front cover plate and combination dial thereof removed, exposing the internal mechanism to view, such view corresponding to that indicated by line 1 1 of FIGURE 5;

FIGURE 2 is a side view, principally in elevation, corresponding to that indicated by line 2-2 of FIGURE l;

FIGURE 3 is a bottom view, partly in elevation and partly in horizontal section, and co-rresponding approximately to that taken on line 3-3 of FIGURE 2;

FIGURE 4 is a fragmentary bottom view of a portion of the apparatus of FIGURE 3, principally in horizontal section, taken on line 4--4 of FIGURE 1;

FIGURE 5 is a sectional elevational view, with portions shown in elevation, taken on line 5-5` of FIGURE l;

FIGURE 6 is a reduced sized, front elevational view of the apparatus of FIGURE 5.

FIGURE 7 is a reduced sized, sectional elevational view taken on line 7 7 of FIGURE 5;

FIGURE 8A is a fragmentary, detailed view, partly in elevation and partly in section, of a portion of the mechanism as viewed from line S-S of FIGURE 5, illustrating the relative positions of certain apparatus elements thereof under one condition of operation of the apparatus;

FIGURE StB is a view of the same apparatus shown in FIGURE 8A, illustrating the relative positions ofthe same apparatus element thereof under another condition of operation of the apparatus;

FIGURE 9 is a detailed, perspective view of one of the apparatus elements shown in FIGURES 3, 4, 5 and 7;

FIGURE 10 is an exploded, perspective view showing the principal apparatus elements of the lock assembly;

FIGURE 1l is a view of the same apparatus shown in FIGURE 1, illustrating the positions of the apparatus elements in au initial stage of a key operation of the lock apparatus;

FIGURE l2 is a view olf the same mechanism shownv in FIGURES 1 and 11, illustrating the positions of the apparatus elements in a second, intermediate stage of a key operation of the lock apparatus;

FIGURE 13 is a rview of the same mechanism shown in FIGURES l, 11 and 12 illustrating the positions of the :apparatus elements in an initial stage of a combination lock operation of the lock apparatus;

FIGURE 14 is a view of -the same mechanism shown in FIGURES 1, ll, 12 and 13 illustrating the position of a temporary lapparatus elements in a second intermediate stage of a combination lock operation of the lock apparatus;

Referring rst primarily to FIGURES l and 5, the principal externally visible components of the apparatus of the invention are; a hollow, rectangular sheet metal lock case 10 having suitable attachment ears 2S and 27 extending externally therefrom, a raised, generally rectangular shaped escutcheon plate 164 attached to the front of the lock case 10 by means of bolts 16-8 and 170 which pass through the attachment ears 25 and 27, a combination dial 152 rotatably supported on the front of the escutclieon plate 164, and a key-operated cylindrical-lock plug 174, the outer key slotted end 175 of which extends through an aperture 176 in the outer end 178 of the dial 152. A wall member of a door, or the like enclosure device in which the lock apparatus may be installed, may be clamped between the front of the lock case 10 and the bac-k of the esoutcheon plate 164 as shown at 172.

Referring next in more detail to FIGURES 1, 5, and l0, the hollow Irectangular sheet imetal lock case 10, in which the principal bolt actuating and comblnation lock mechanism is contained, is constructed preferably with integrally formed, opposite side walls 12 and 14, bottom and top walls 16 and 18, rear wall 20, and a `detachable fron-t cover plate 22. When assembled, the cover plate 22 is retained in place on the front of the lock case 10 primarily by means of a retainer screw 24, which passes through a hole 26 therein and threads into the forward, internally threaded end of a crosswise extending pilar 28. The rearward end of the pillar 28 is rigidly attached perpendicularly to the back wall 20 by means of a reduced diameter shank portion 21 thereof which is pressed through a hole 23 in the back -wall 20 and is riveted over at the outer end 30 as best shown in FIGURE 3.

Vertically slidably mounted in the lock case 10 is a lock bolt body 32. The lock bolt body 32 is generally T- shaped in for-m, having an outwardly projecting, rectangular sectioned lock bolt portion 34 and an inner laterally flared lock yoke portion 36 of slightly greater vertical length and su-bstantially greater lateral width than the lock bolt portion 34. The lock yoke portion 36 includes a pair of laterally oppositely extending, substantially rectangular ange portions 38 and 40. The back wall 20 and the cover plate 22 are formed with oppositely positioned, vertically extending guide slots 42 and 44 respectively therethrough, into which the outer edge portions of the rectangular flange portions 38 and 40 of the lock yoke portion 36 extend and are therein retained for guided vertical sliding movement, whereby the lock bolt body 32 carrying the lock bolt portion 34, is vertically slidable between a lowerimost position as best shown in FIGURES 1 and l1, and an uppermost position as shown in FIG- URES l2 and 14. The lock bolt portion 34 extends outwardly through a vertically elongated rectangular slot 46 formed in the side wall 12- of the lock case 10.

The lock bolt body 32 is formed adjacent the juncture of the lock bolt portion 34 and the inner lock yoke portion 36 with a vertically extending cylindrical recess 50, blind at its lower end 51 and open at its upper end 52, as best shown in FIGURES 1 and 10. Extending coaxially into and partially contained within the cylindrical recess 50 is a helical compression spring 54 and a vertical guide rod 56. The upper end of the vertical guide Yrod 6 is fixed to the adjacent top wall 18 of the lock case 10, coaxial of the cylindrical recess 50, by suitable means such as by being press-fitted into a hole 58 formed in top wall 1.8. The length of the vertical guide rod 5'6 is such that its lower end is just short of bottoming in the cylindrical recess 50 when the lock bolt body 32 is in its uppermost position as shown in FIG- URES l2 and 14. The compression spring 54 which is guided and supported partly by the vertical guide rod 56 and partly by the walls of the cylindrical recess 50, acts in compression between the undersurface of the top `wall 18 of the lock case 10 and the bottom of the cylindrical recess 50 such as at all times to bias the lock bolt body 32 toward its lowermost position shown in FIGURES l and 1l.

Supported horizontally within the upper portion of the lock case is an elongated lock bolt blocker bar 60. The blocker bar `60 is supported such as to be longitudinally reciprocable between limits, the extreme left-hand positional limit being shown in FIGURE 1 and the extreme right-'hand positional limit being shown in FIGURE l1. Such support yfor the blocker bar `60 is provided by a guide pin l62. and a pi-vot pin 66. The guide pin `62 extends through an elongated guide slot 64 formed through the left-hand end portion of the blocker bar 60, and the pivot pin 616 extends through an elongated guide slot 68 formed through the right-hand end portion of the blocker bar `60. The guide pin 62, which is formed with an enlarged inner end shank 63 (see FIGURE l0), is fixed at its inner end 71 to the rear wall 20 of the lock case 10, and the pivot pin 66 extends through and is carried by the upper end portion of a pivotable blocker lever 70. The blocker bar l60 is `formed on its lower surface with a cutout having an arcuate portion 72 (see FIGURE l0) and a laterally extending shoulder 74, the purpose of which, in connection with the key operation of the lock, is hereinafter more fully described. The blocker bar 60 is also formed adjacent its right-hand end portion with an interval 76 of reduced vertical width, thereby providing a pair of shoulders 78 and 80 which serve as stop means for one end of a helical compression spring 82, the opposite end of which engages the adjacent side of the upper-end portion of the beforementioned blocker lever 70. The spring 82, acting under compression, serves to bias the blocker bar 60 away from its extreme righthand position relative to the upper end portion of the blocker lever 70 as shown in FIGURES ll, 12 and 14, toward its extreme left-hand position relative to the upper end portion of the blocker lever 70, .as shown in FIG- URES l and 13, as permitted by sliding movement of the pivot pin 66 along the guide slot 68.

The blocker lever 70 is pivotably supported in a generally vertical position, as viewed in the drawings, upon a tubular pivot shaft 86. The innermost end portion of the pivot shaft 86 is xed perpendicularly to the rear wall 20 of the lock case 10, by means of a short tubular shank portion 87 thereof which is pressed through a circular hole and rolled over at the end as shown at 88, and the outer portion of the pivot shaft 86 extends through a semicylindrical bearing bore 90 formed through the midsection of the blocker lever 7. The inner end portion of the pivot shaft 86, outwardly of the shank portion 87, is formed with a radial flange 92 which engages the inner shoulder 96 of a coaxial, cylindrical recess 98 formed in the inner end of the semicylindrical bearing bore 90, which serves to limit the inward axial position of the blocker lever 70 on the pivot shaft 86. The outer end portion of the pivot shaft 86 is provided with a snap-ring groove 100 containing a snap-ring 102 which serves to retain the blocker lever 70 on the pivot shaft 86 in the beforementioned axial position relative to radial ange 92.

The lower end portion of the blocker lever 70 carries a laterally projecting gate dog member 108 having an elongated end surface 109 which is thereby positioned and movable in a generally radial direction with respect to the center of a combination disc assembly supporting shaft 1-10, which shaft 110 and disc assembly shown generally at 112 (see FIGURE l) will be hereinafter more fully described.

The lower end portion of the blocker lever 70, below the pivot bearing bore 90 therein, is provided with a laterally facing cylindrical recess 104 which supports the lefthand end of a helical compression spring 106, the righthand end of which bears against the adjacent inside surface of the side wall 14 of the lock case 10. The helical compression spring 106, acting under compression, applies a rotational force to the blocker lever 70, tending constantly to pivot it in a clockwise direction about pivot shaft 86, from the position illustrated in FIGURES l, 1l and l2 in which the end surface 109 of the gate dog member 108 is in riding engagement with the peripheries of the combination discs of the combination disc assembly 112, into the position illustrated in FIGURE 13 in which the gate dog member 108 has moved into engagement with the gate notches formed in the edges of the combination discs.

The beforementioned combination disc assembly supporting shaft 110, which supports the beforementioned combination disc assembly shown generally at 112, is

formed with an inner end cylindrical pivot portion 114, an adjacent annular iiange portion 1-16, a rectangular flatted section 118 intermediate the pivot portion 114 and the flange portion 116, and on the outer end with a rectangularly atted section 120. The cylindrical pivot portion 114 of the supporting shaft 110 is pivotally supported in a pivot bore 122 located centrally through the rear wall 28 of the lock case 10. The outer ilatted section 120 of the supporting shaft 110 extends into supporting and driving engagement with a correspondingly shaped socket 121 formed in the inner end of a driver coupling member 124, which is in turn rotatably supported within the tubular hub portion 126 of an externally gear toothed combination disc driver gear 128. The hub portion 126 of the driver gear 128 is in turn rotatably supported within the circular opening 130 of a retainer spider '132. The retainer spider 132 is formed with four diametrically oppositely extending arms 134, 136, 138, and 140. The arms 134, 136, 138 which are angular in shape and one arm 140 which is straight, seat within and make nonrotational coupling engagement with four correspondingly positioned crosswise extending slots 142, 144, 146, and 148, formed in the inner annular end 150 of the graduated combination actuating dial 152. The axial depth of the slots 142, 144, and 146 for receiving the arms 134, 136, and 138 respectively of the retainer spider member 132, are deeper than the slot 148, which receives the arm 140. The outer end portions of the arms |134, 136, and 138 are held in the beforementioned engagement with the slots 142, 144, and 146 formed in the inner end 150 of the graduated combination actuating dial 152, by means of a snap-ring 154, which engages an outwardly facing, annular groove 156, which encircles the beforementioned inner end 150 of the dial 152, the position of such annular groove 156 being such as to retain the outer faces of the outer end portions of the arms 134, 136, and 138 of the retainer spider 132, in rotational sliding engagement with the inwardly facing marginal surface 158 of a circular opening formed centrally in the outwardly raised portion 162 of the escutcheon plate 164. The graduated combination actuating dial 152 is thus rotatably attached to and supported by the beforementioned escutcheon plate 164. As beforementioned, the escutcheon plate 164 is fastened by means of bolts 168 and 170 to the attachment ears 25 and 27 of the lock case 10. In a typical installation of the apparatus, the front wall member |172 of a door cover or the like device is positioned and clamped between the inner surface of the escutcheon plate 164 and the outer surfaces of the attachment ears 25 and 27, as best shown in FIGURE 5.

Fixed eccentrically in a pocket 175 formed within the body of the combination actuating dial 152 is the conventional key-operated mechanism 174. The slotted outer end 177 of the key-operated mechanism 174 is exposed through the aperture 176, formed through the outer end 178 of the actuating dial 152 and is provided with a key slot 180 for receiving a conventional key (not shown) for operation of the lock. Extending inwardly from the inner end 182 of the key-operated mechanism 174, and rotatably connected to the mechanism therein, is a small, externally toothed pinion gear segment I184, formed with a flat untoothed side portion as shown at 186. Upon rotation of the pinion gear segment 184, by means of a lock key, from the position shown in FIGURE 8A to that shown in FIGURE 8B, the teeth 188 of the pinion gear segment 184 are brought from a disengaged position, into meshing engagement with the teeth 190 of an annular, internal gear 192, which is formed integrally with the outer end of the beforementioned driver coupling member 124.

Referring next, primarily, to FIGURES 3, 4 and 5, the body portion of the combination actuating dial 152 is provided with an eccentrically located cylindrical recess 196 entering the inner end thereof, coaxial with an internal tooth opening 200 formed through the short arm 140 of the retainer spider member 132. Contained rotatably and axially slidable within the cylindrical recess 196, is an elongated, externally toothed, combination adjusting pinion 198. The combination adjusting pinion 198 is axially slidable in the recess 196 between the extended and retracted positions shown respectively in FIGURES 3 and 4, the adjusting pinion 198 being biased toward the extended position shown in FIGURE 3 by means of a Small helical compression spring 202 which acts in compression between the bottom of the recess 196 and the adjacent end of vthe combination adjusting pinion 198. The limit of extension of the combination. adjusting pinion 198, as shown in FIGURE 3, is determined by a small snap-ring which encircles an annular groove formed around the external teeth of the adjusting pinion 198 and which engages the external gear teeth 208, formed on the periphery of the disc-shaped driver gear 128. The outer end of `the combination adjusting pinion 198 is provided with a coaxial, Vrectangular socket 210, which, as shown in FIGURE 4, is adapted to receive the correspondingly shaped end 212 of a combination adjusting tool rod 214, which may be inserted from the back side of the lock case 10, through the bore of the tubular pivot shaft 86, and through coaxial openings 216and 217 in the front cover plate 22 .and the front wall member 172. When the combination adjusting pinion 198 is in its extended position under the action of spring 202 as shown in FIG- URE 3, it extends into the internally toothed opening 200 in the arm 140, with the external teeth thereof in meshing engagement with both the gear teeth 208 of the driver gear 128 and the internal teeth of the opening 200. In this latter position, the combination adjusting pinion 198 is prevented from rotating, by reason of its teeth being in locking engagement with the teeth of the opening 200 in the arm 140, and under this latter condition, any rotation of the graduated combination actuating dial 152, will be transmitted from the dial directly through the combination adjusting pinion 198 to the teeth 208 of the driver gear 128, and thence to the tubular hub portion 126 thereof. The inner end of the tubular hub portion 126 is provided with a pair of diametrically opposite, inwardly extending dog coupling members 218 and 220, which make driving coupling engagement with a pair of corresponding dog coupling slots 222 and 224 formed in a cylindrical sleeve 226 attached to and extending coaxially from the first combination disc 228 of the combination disc assembly 112, and by means of which the iirst combination disc 228 is adjustably rotatable by means of the graduated combination dial 152, as will be hereinafter described.

When the combination adjusting pinion 198 is retracted in recess 196 by axial force applied thereto by the inner end 212 of the combination adjusting tool rod 214 to the position shown in FIGURE 4, the gear teeth of combination adjusting pinion 198 are moved axially out of engagement with the internally toothed opening 200 in the arm of the retainer spider member 132, but still remain in driving engagement with the gear teeth 208 of the externally 4toothed driver gear 128. The adjusting pinion 198 is thus freed for rotation by means of the adjusting tool rod 214. In such retracted position, rotation of the combination adjusting pinion 198 in the recess 196 results in rotational displacement of the driver gear 128, thereby rotationally displacing the first combination disc 228`and the combination dial 152 relative to one another. Such rotational displacement of the first combination disc 228 and combination dial 152 relative to one another results in changing the correlation between the graduations on the combination dial 152 and the operative manipulative positions of the combination disc assembly 112, thereby changing the operative combination.

Referring again to the combination disc assembly shown generally at 112 in the several gures, the apparatus elements thereof, which are best shown in detail in FIG- URE 10, are as follows: Coupled to the i'latted end portion 118 of the combination disc assembly supporting shaft 110 is a blocker bar ret-ractor lever 230 having a central, Hat-Sided opening 232 drivingly engaging the atted portion 118 of the Shaft 110 and also having an axially extending retractor arm 234. The retractor lever 230 is thus positioned in the assembly on the shaft 110 intermediate the inner surface of the rear wall 20 and the rearward surface ofthe annular liange 116. Rotation of the shaft 110 thus results in corresponding rotational displacement of the retractor lever 230 and retractor arm 234, Such that a clockwise rotation of the shaft 110 will `move the retractor arm 234 from the position Shown in FIGURE l to the position shown in FIGURE Il, at which the right-hand edge of the retractor arm 234 is brought into operative engagement with the Shoulder 74 on the lower side of the blocker bar 60, whereby the blocker bar 60 may be moved from the position shown in FIGURE 1 to that shown in FIGURE 11.

Coaxially supported upon the combination disc assembly supporting Shaft 110 is a combination disc supporting tubular sleeve 236, carrying at its inner end an annular flange 238 through which, in turn, axially extends a pin 240. The pin 240 extends into coupling engagement with pin hole 242 formed axially through the annular hub portion 244 of a cam body 246. The cam body 246 is formed with an elongated cam lever 248 and a relatively shorter cam lobe 250, and the hub portion 244 thereof is formed with a central, circular opening 252 which encircles and, in the assembly, is rotatably supported upon the exterior cylindrical surface 254 of the annular flange portion 116 of the shaft 110.

Coaxially supported upon the combination disc assembly supporting sleeve 236, between the forward end and the flange 238 are the following components of the combination assembly: The first combination disc 228, a second combination disc 257, a third combination disc 259 and a Scrambler cam 256 having a radially extending cam lobe 258. Also carried on the tubular sleeve 236 intermediate the first combination disc 228 and the second combination disc 257 is a first spacer-ring 260, intermediate the Second combination disc 257 and the third combination disc 259, is a second spacer-ring 262, and intermediate the third combination disc 259 and the outer face of the annular liange 238 is the beforementioned scrambler cam member 256, which acts as a third spacer-ring. The rst, second and third combination discs 228, 257, and. 259 are freely rotatable on the sleeve 236, but the first and second Spacer-rings 260 and 262 are nonrotatable on the sleeve 236 by reason of radially inwardly extending keys 264 and 266 formed in the bores thereof which make axial sliding, nonrotational engagement with a longitudinal key Slot 268, formed lengthwise of the exterior surface of the tubular sleeve 236. The Spacer-rings 260, 262, being thus rotationally fixed with respect to the sleeve 236, prevent rotational movement of the several combination discs thereon from being frictionally transmitted from one to the other.

The first combination disc 228 is provided intermediate its center bore and periphery with an axially, inwardly extending combination drive pin 269. The second combination disc 257 is similarly provided with circumferentially spaced-apart, axially inwardly and outwardly extending combination disc drive pins 270 and 272, and the third combination disc 259 is likewise provided with circumferentially spaced-apart, axially inwardly and outwardly extending'combination disc drive pins 274 and 276. All of the combination disc drive pins, namely drive pins 269, 270, 274 and 276 are positioned at the same radial distance from the centers of the discs, such that upon impart ingrotation to the combination discs relative to each other, the combination disc drive pins will move into driving engagement with one another such as to enable the combination discs to be rotationally positioned relative to each other in Sequence and in accordance with a predetermined combination relationship, as is well known in the combination lock art.

The innermost one of the beforementioned combination drive pins 274, makes driving coupling engagement with a pin hole 278, formed through the annular portion of the Scrambler cam member 256, whereby the third combination disc 259 and the Scrambler cam member 256 are rotationally coupled together.

The beforementioned cam lever 248 of the cam body 246 extends into driving engagement with a rectangular slot 280 formed in an intermediate portion of the edge of the inner flange portion 38 of the lock bolt body 32, whereby upward and downward movement of the lock bolt body 32, against or with the force of the helical compression spring 54, causes corresponding clockwise and counterclockwise rotational movement of the cam body 246.

Rotatively supported upon the beforementioned pillar 28 is a Scrambler cam assembly Shown generally at 282. The Scrambler cam assembly 282 comprises a central bearing sleeve 284 rotatable upon the pillar 28 and having xed at an intermediate section thereof a cam plate 286 formed with a generally radially extending cam arm 288 and a generally radially extending Scrambler actuating cam lobe 290. In the assembly, the plane of the cam plate 286 and the plane of the Scrambler cam member 256 are axially coincident Such that upon clockwise rotation of the Scrambler cam assembly 282, through a given clockwise displacement, the Scrambler actuating cam lobe 290 is brought into actuating contact with the left-hand edge 292 of the Scrambler cam lobe 258. The cam plate 286 of the Scrambler cam assembly 282 is provided with a third radially extending arm portion 294, through the outer end portion of which is xed an axially extending spring bearing pin 296. Coiled about the intermediate portion of the central bearing sleeve 284 `of the Scrambler cam assembly 282, is a helical torsion spring 298, one end of which bears upon the upper side of the beforementioned spring bearing pin 296 and the opposite end of which bears upon the adjacent inner Surface of the bottom wall 16 of the lock case 10. The action of the spring is thus such as to bias the Scrambler cam assembly 282 rotationally clockwise on the pillar 28 such that when the lock bolt body 32 is in its lowermost position as Shown in FIGURES l and ll, the upper edge 300 of the cam arm 288 will be in forceful engagement with the lower end of the lock bolt body 32 and thus be restrained to its most counterclockwise rotational position, aS shown in the aforementioned FIG- URES l and 1l, under which condition the Scrambler actuating cam lobe 290 will be angularly positioned out of contact with the edge 292 of the Scrambler cam lobe 258.

However, when the lock bolt body 32 is moved upwardly toward its uppermost position, as shown in FIG- URES I4 and I2 respectively, the lower end of the lock bolt body 32 is moved upwardly out of engagement with the upper edge 300 of the cam arm 288, thereby permittin-g the Scrambler cam assembly 282 to rotate clockwise upon the pillar 28 through an angle sufficient to bring the Scrambler actuating cam lobe 290 into forceful contact with the edge 292 of the Scrambler cam lobe 258 of the Scrambler cam member 256, thus causing rotation of the Scrambler cam member 256 and the third combination disc 259 upon the tubular sleeve 236 from the position Shown in FIGURE 13 to the position shown in FIGURE 12. Such resultant rotation of the third combination disc 259 has the effect of scrambling or, in other words, disarranging the previous correlation of the several combination discs accomplished by a previous manipulation of the combination dial in accordance with the predetermined combination.

Each of the combination discs, namely the first, second and third combination discs 228, 257 and 259, respectively, are provided with a Single, generally rectangular, radially inwardly extending notch or gate slot, as best shown at 302, 304, and 306, respectively, in FIGURE 10.

Such gate slots 302, 304, and 306 are of such size and shape as to permit entrance thereinto of the outer end portion of the beforementioned gate dog member 108 when the gate slots 302, 304, and 306 are brought into simultaneous axial alignment therewith, as best illustrated in FIGURE 13. Such entrance of the outer end portion of the gate dog member 108 into the aligned gate slots 302, 304, and 306 permits an angular pivotal movement of the blocker lever 70 from the position shown in FIG- URE 1 to that shown in FIGURE 13.

For the sake of simplification and convenience of description, the combination lock assembly portion of the apparatus of this invention has been shown and described as having three sets yof combination discs, such as shown at 228, 257 and 259. However, such combination lock assembly is not necessarily limited to three sets of combination discs, but may have any greater or lesser number of similarly interconnecting combination discs, depending upon the degree of security and complication desired in the resultant lock combination.

The operation of the apparatus is as follows:

In a normal locked condition of the mechanism, the positions of the parts thereof are as shown in FIGURE 1. Under such locked condition, the lock bol-t body 32 is in its lowermost position, as permitted lby the Iguide slots 42 and 44 and the rectangular slot 46, and the blocker bar 60 is located in its extreme left-hand position', with the lower surface portion 308 of the left-hand end of the blocker bar 60 positioned immediately above the upper surface of the lock yoke portion 36, thereby blocking upward unlocking movement of the lock bolt body 32. In this initial locked condition, the lock bolt portion 34 cannot be moved upwardly in an unlocking direction relative to the lock case by any external means, such as, for example, that diagrammatically illustrated at 310.

When it is desired to activate the mechanism to an unlocked condition, this can be accomplished in two separate ways, namely either by the key-operated mechanism 174 or by manipulation of the combination actuating dial -52 in accordance with a predetermined combination.

The unlocking operation by means of the key-operated mechanism 174 is as follows:

Upon insertion of a proper key into the slot 180 of the key-operated mechanism 174 and upon rotation thereof, the inner pinion gear segment 184 is caused to rotate from the position shown in FIGURE 8A to that shown in FIGURE 8B, in which latter position the gear teeth 188 of the pinion gear segment 184 are brought into operative meshing engagement with the gear teeth 190 of the internal gear 192. The rotation thus imparted to gear 192 is transmitted through the driver coupling member 124 to the atted section 120 of the combination disc assembly supporting shaft 110, which, in turn, rotates the retractor lever 230 in a clockwise direction through an angle sucient to bring the retractor arm 234 into forceful contact with the shoulder 74 of the blocker bar 60, with the result that blocker bar 60 is moved in a right-hand direction, against the force of spring 82, from the position shown in FIGURE 1 to that shown in FIGURE 11. Such movement of the blocker bar 60 displaces the lower surface portion 308 thereof from its blocking position relative to the upper end of the lock bolt yoke portion 36, thereby freeing the lock bolt body 32 and lock bolt portion 34 for upward movement by an external actuating means such as that shown at 310, from the locked position shown in FIGURE l, to the unlocked position shown in FIGURE 12.

Following the before-described key-operated unlocking procedure, if it is desired to re-establish the locking condition of the lock mechanism, the upward force applied by the unlocking means 310 is removed, thereby permitting the lock bolt body 32 to snap downwardly,

under the force of the helical compression spring 54,

10 FIGURE 1, and the blocker bar 60 will snap back under the force of the helical compression spring `82 to its original position shown in FIGURE l, thereby re-establishing the blocked condition between the blocker bar 60 and the upper end surface of the lock yoke portion 36 of the lock bolt body 32.

The unlocking operation of the apparatus by means of manipulation of the combination lock assembly, is as follows:

Rotation of the graduated combination actuating dial 152 is transmitted through the combination adjusting pinion 198, which is normally locked in nonrotational position by reason of its engagement with the internally tooth opening 200 in the arm of the retainer spider member 132, to the driver gear 128, the tubular hub portion 126 thereof and through the dog coupling members 218 and 220, to the cylindrical sleeve 226 which contains the dog receiving slots 222 and 224. From the sleeve 226, such rotation is communicated to the first combination disc 228. Upon such rotation of the rst combination disc 228 in a predetermined direction, the combination disc drive pin 269 is brought into driving engagement with the driving pin 272 of the second combination disc 257, which is thereby in turn rotated suiciently to bring the drive pin 270` of the second cornbination disc 257 into driving contact with the drive pin 276 of the third combination disc 259, which in turn, by reason of the driver pin 274, also rotates the Scrambler cam member 256 therewith. Following such rotation of the first, second and third combination discs 228, 257, and 259, as beforedescribed, the dial is then adjustably rotated in opposite, alternate directions sequentially through predetermined angles in accordance with the predetermined combination, as is well known in the art, which results in rotationally moving the combination discs on the tubular sleeve 236 Sequentially to such positions as to bring the gate slots 302, 304, and 306 thereof, into simultaneous axial alignment with one another immediately opposite and in alignment with the end portion of the gate dog member 108. At the same time, the Scrambler cam member 256 is positioned `with its cam lobe 258 adjacent the cam lobe 250 of the cam body 246. Upon so positioning the gate slots 302, 304, and 306, the pivotable blocker lever 70, being rotationally biased by means of the helical compression spring 106, will be free to rotate clockwise about the pivot shaft 86, such as to snap the gate dog member 108 into the thus aligned gate slots 302, 304, and 306, to the position illustrated in FIGURE 13. Such angular movement of the blocker lever 70 moves the pivot pin 66 in the upper end thereof into forceful contact with the right-hand end of the guide slot 68 in the righthand end portion of the blocker bar 60, thereby moving the blocker bar 60 from the position shown in FIGURE 1 to that shown in FIGURE 13. Such latter movement of the blocker bar '60 removes the lower surface portion 308 of the blocker bar 60 out of blocking alignment with the upper end surface of the lock yoke portion 36, thereby freeing the lock bolt body 32 for -upward unlocking movement from the position shown in FIG- URE 13 to that shown in FIGURES 12 and 14. FIG- URE 14 being an intermediate, temporary position and FIGURE 12 the stable, unlocked position of the parts.

Upon such upward movement of the lock bolt body 32 from the position sho-wn in FIGURE 13 to that shown in FIGURE 14, the cam lever portion 248 of the cam body 246, which engages the rectangular slot 280 in the flange portion 38 of the lock yoke portion 36, is correspondingly moved upwardly, thereby imparting clockwise rotation to the cam body 246 through an angle suicient to bring the outer edge of the cam lobe 250 into contact with the end surface portion 109 of the gate dog member 108, such as to force the gate dog member 108 radially outwardly out of the gate slots 302, 304, and 306 to the positions shown in FIGURE 14, thus freeing the combination discs for rotation upon the sleeve 236. At the same time the restraining contact between the lower end surface of the lock yoke portion 36 and the upper edge 300 of the cam arm 288 is removed, thereby freeing the Scrambler cam assembly 282 to rotate in a clockwise direction under the force of the torsion spring 298, such as to bring the Scrambler actuating cam lobe 290 into forceful contact with the edge 292 of the cam lobe 258 of the Scrambler cam member 256, which in turn results in rotation of the scrambler cam member 256 and the third combination disc 259, which is coupled thereto, counterclockwise through an angle sufficient to displace the gate slot 306 thereof out of alignment with the other gate slots in the other combination discs and out of alignment with the gate dog member 108, into the stable, unlocked position of FIG- URE 12.

Upon forcing the gate dog member 108 out of engagement with the gate slots 302, 304, and 306 as befor described, the blocker lever 70 is thereby caused to pivot from the position shown in FIGURE 13 to that shown in FIGURE 14, such pivotal movement of the blocker lever 70 being made possible by compression of the helical spring 82 and movement of the pivot pin 66 from the right-hand end to the left-hand end of the guide slot 68 in the right-hand end portion of the blocker bar 60. Force is thus applied to the blocker bar 60, tending to move it in a right-hand direction, but such movement of the blocker bar 60 is prevented by engagement of the left-hand end surface 212 of the blocker bar 60 with the vertical inside sur-face of the lock yoke portion 36, as shown in FIGURE l2.

When it is desired to reestablish the locking condition of the lock mechanism, the upward force applied to the lock bolt body 32 by such means as the unlocking means 310 must be removed, thus permitting the lock bolt body 32 to move downwardly under the force of spring 54 from the position shown in FIGURE l2 to that shown in FIGURE l, whereupon the blocker bar 60 is released by the lock bolt body 32 to return by movement in a lefthand direction, from the position shown in FIGURE l2 to that shown in FIGURE l, whereupon the blocking position of the blocker bar 60 relative to the upper surface of the lock bolt body 32 is re-established, and the lock cannot then be actuated to an unlocked condition without again employing either the key method or the combination manipulation method for effecting the unlocking operation, as hereinbefore described.

If at any time it is desired to change the combination of the lock, this can be accomplished without removal or disassembly of the lock apparatus. Such change of the combination is accomplished by inserting the rod 214 of the beforedescribed combination adjusting tool through the bore of the tubular pivot shaft 86 a sufhcicnt distance to bring the inner squared end 212 thereof into coupling engagement with the rectangular socket 210 in the inner end of the combination adjusting pinion 198. Upon so positioning the adjusting tool rod 214, inward force is applied therethrough sufficient to retract the combination adjusting pinion 198 axially inwardly into its crylindrical recess 196 a sufficient distance to remove the external gear teeth thereof from engagement with the toothed opening 200 in the arm 140 of the retainer spider member 132. In such retracted position, the external teeth of the combination adjusting pinion 198 remain in meshing engagement with the gear teeth 208 of the driver gear 128, which is, in turn, coupled through the tubular hub portion 126 thereof to the first combination disc 228 as hereinbefore described. Rotation of the combination adjusting pinion 198 while in this latter position causes rotation of the driver gear 128, which, in turn, rotationally `displaces the angular position of the first combination effect of proportionally shifting all of the combination numbers to different values.

By furnishing the driver gear 128 and the combination adjusting pinion 198, each with a predetermined number of gear teeth, and likewise designing the opening 200 in the arm of the retainer spider member 132 accordingly, the gear ratio between the combination adjusting pinion 198 and that of the driver gear 128 can be made such that the adjusting rotation of the combination adjusting pinion 198 by means of the adjusting tool rod 214 through a predetermined angular amount, produces a predetermined known change in the combination. For example, if the driver gear 128 is provided with fifty gear teeth and the combination adjusting pinion 198 is provided with ten teeth, then the gear ratio between the adjusting pinion 198 and the driver gear 128 will be 5 to l. Therefore, if the adjusting pinion 198 is rotated one complete turn, the relative angular position between the combination actuating dial 152 and the combination disc assembly 112 will be changed by an angle corresponding to one-fifth of a turn. Thus, if the combination actuating dial carries fifty graduations, the combination numbers will all be shifted by an amount equal to ten graduations. By placing suitable radial graduations on the disc 314 of the adjusting tool rod 214, which graduations may be aligned with a given mark on the lock case, any magnitude of shift and any predetermined shift of the combination greater or less than that hereinbefore described from one known combination to another known combination may be accomplished.

It is to be understood that the foregoing is illustrative only, and that the invention is not limited thereby, but includes all modifications thereof, within the scope of the invention, as defined in the appended claims.

What is claimed is:

1. In a lock mechanism having a case and a lock bolt extending therefrom for movement transversely thereof between a first unlocking position and a second locking position, apparatus comprising:

a lock bolt body in said case from which said lock bolt laterally extends;

guide means in said case for guidingly supporting said lock bolt body for movement thereof between first and second positions respectively corresponding to said transverse movement of said lock bolt;

a blocker member in said case;

guide means for said blocker member for guidingly supporting said blocker member for movement thereof into and out of the path of said movement of said lock bolt body, whereby when said lock bolt body is in its said second position, said blocker member is positionable in said path of movement to prevent return movement of said lock bolt body from said second position to said first position;

a combination lock mechanism in said case having at least two separate combination discs mounted for separate manipulative rotation coaxially of each other, said discs each having a gate notch formed in the periphery thereof;

a lever in said case mounted for pivotal movement thereof about a rotational axis fixed therein;

connecting means pivotally connecting said lever adjacent an outer end portion thereof with said blocker member;

whereby positioning of said lever in a first and a second pivotal position relative to Said case applies force through said pivotal connection, tending to move said blocker body respectively on its said guide means into and out of the said path of movement of said lock bolt body;

a gate dog carried by said lever and positioned thereon such as to be movable by pivotal motion of said lever into riding contact with adjacent peripheries of said combination discs, thereby to position said lever in said first pivotal position and to be movable into said gate notches therein, thereby to position said lever in said second pivotal position;

resilient means constantly biasing said lever pivotally in a direction such as to urge said clutch dog into such riding contact with the peripheries of said combination discs and into said gate notches when all Said gate notches are in simultaneous registry with said gate dog;

and means for rotational manipulation of said combination discs such as to bring said gate notches into such simultaneous registry with said gate dog.

In a lock mechanism having a case and a lock bolt extending therefrom for movement transversely thereof between a first unlocking position and a second locking position, apparatus comprising:

a lock bolt body in said case from which said lock bolt laterally extends;

guide means in said case for guidingly supporting said lock bolt body for movement thereof between first and second positions respectively corresponding to said transverse movement of said lock bolt;

a blocker member in said case movable into and out of means connecting said lever adjacent an outer end portion thereof with said blocker member;

whereby positioning of said lever in a first and a secresilient means constantly biasing said lever pivotally in a direction such as to urge said clutch dog into such riding contact with the peripheries of said combination discs and into said gate notches when all said gate notches are in simultaneous registry with said gate dog;

` and means for rotational manipulation of said combination discs such as to bring said gate notches into such simultaneous registry with said gate dog.

In a lock mechanism having a lock case and a lock bolt extending therefrom for movement thereof between a'rst unlocking position and a second locking position relative to said case, apparatus comprising:

lock bolt securing and releasing means in said case for securing said lock bolt in and releasing said lock bolt from one of said first and second positions;

an actuating shaft in said case for actuating said securing and releasing means;

a combination lock mechanism in said case having elements mounted for manipulativerotation coaxially of said shaft;

a dial body mounted externally of said clase for rotation about an axis coaxial of said actuating shaft and coupled to said combina-tion lock mechanism for rotational manipulation thereof;

14 key-operated mechanism fixed in said dial body; segmental pinion gear having a gear-toothed circumferential portion, said segmental gear being rotatably mounted on said dial body for rotation by said lock means on an axis eccentric to and parallel rwith the common rotational axis of said actuating shaft and said dial body; drive gear drivingly coupled to said actuating shaft and rotatable about the axis thereof;

said segmental pinion gear and said drive gear being positioned adjacent one another such4 that the geartoothed circumferential portion of said segmental pinion gear is rotatable by said key-operated mechanism between a first rotational position out of driving engagement with said drive gear and a second rotational position in driving engagement with said drive gear, whereby, when said segmental pinion gear is in said rst rotational position,y said dial body is rotatable to manipulate said combination lock mechanism without rotation of said drive gear and actuating shaft; and when in said second rotational position, said drive gear and said actuating shaft are rotatable for actuating .said securing and releasing means independently of rotation of said dial body.

In a lock mechanism having a lock case and a lock bolt extending therefrom for movement thereof between a first unlocking position and a second locking position relative to said case, apparatus comprising:

lock bolt securing and releasing means in said case actuatable for securing said lock bolt in, and releasing said lock bolt from, one of said first and second positions;

an actuating shaft means rotatably mounted in said case for actuating said securing and releasing means; combination lock mechanism in said case having elements mounted for manipulative rotation coaxially of said actuating shaft;

means responsive to said manipulative rotation of said combination lock means for actuating said securing and releasing means;

dial body mounted externally of said case for rotation coaxially of said shaft and coupled to said combination lock mechanism for such rotational manipulation thereof;

key-operated mechanism fixed in said dial body; segmental pinion gear having a gear-toothed circumferential portion, said-segmental gear being Irotatably mounted on said dial body for rotation by said lock means on an axis eccentric to and parallel with the common rotational axis of said actuating shaft and said dial body;

drive gear drivingly coupled to said actuating shaft and rotatable on the axis thereof;

said segmental pinion gear and said drive gear being positioned adjacent one another such that the geartoothed circumferential portion of said segmental pinion gear is rotatable by said key-operated mechanism between a first rotational position out of driv` a combination operated mechanism assembly;

combination actuating shaft operatively coupled to said assembly, said assembly being operatively rel5 sponsive to a predetermined program of sequential angular rotational movements of said shaft;

a dial mounted for rotation coaxia-lly of said combination actuating shaft;

coupling means drivingly interconnecting said dial and said combination actuating shaft, including;

a first coupling member fixed to said dial for coaxial rotation thereby,

a second coupling member fixed to said combination actuating shaft,

one of said coupling members comprising a coaxial drive gear,

a pinion -gear rotatably supported by the other of said coupling members and making driving engagement with said drive gear;

clutch means actua-ble selectively to engage and disengage said pinion gear for respectively preventing and permitting rotation thereof relative to Sai-d other of said coupling members;

and means for such actuation of Said clutch means and for such rotation of said pinion gear, when said clutch means is thus actuated, to disengage said pinion gear;

whereby the rotational angular relationship between said coupling members and thereby between said combination actuating shaft and said dial is tixedly adjustable.

6. In a lock mechanism, apparatus comprising:

a combination operated mechanism assembly;

a combination actuating shaft operatively responsive to a predetermined program of sequential angular rotational movements of said shaft;

a dial mounted for rotation coaxially of said combination actuating shaft;

coupling means drivingly interconnecting said dial and said combination actuating shaft, including:

a first coupling member fixed to said dial for coaxial rotation thereby,

a second coupling member fixed to said combination actuating shaft,

one of said coupling members comprising a coaxial drive gear,

a pinion gear rotatably supported by the other of said coupling members for rotation about an axis parallel with and eccentric to the common axis of said coupling members and making driving engagement with said drive gear;

clutch means actuable selectively to engage and disengage said pinion gear for respectively preventing and permitting rotation thereof relative to said other of said coupling members;

and means for such actuation of said clutch means and for such rotation of said pinion gear, when said clutch means is thus actuated, to disengage said pinion gear,

whereby the rotational angular relationship between said coupling members and there-by between said combination actuating shaft and said dial is fixedly adjustable. 7. In a lock mechanism having enclosure means therefor including a lock case, apparatus comprising:

a combination operated mechanism assembly in said lock case,

a combination actuating shaft operatively coupled to said assembly, said assembly being operatively responsive to a predetermined program of sequential, angular rotational movements of said shaft;

a dial mounted exterior of the front of said enclosure for rotation coaxially of said combination actuating shaft;

coupling means in said enclosure drivingly interconnecting said dial and said combination actuating shaft, including:

a first coupling member fixed to said dial for coaxial rotation thereby,

a second coupling member fixed to said combination actuating shaft,

one of said coupling members comprising a coaxial drive gear,

and the other of said coupling members including a pinion gear rotatably supported thereby and making driving engagement with said drive gear;

clutch means actuatable selectively to engage and disengage said pinion gear for respectively preventing and permitting rotation of said pinion gear relative to said other of said coupling members;

an opening in said lock case;

and means actuatable by adjusting means insertable through .said opening into engagement with said pinion gear for such actuation of said clutch means and for such rotation of said pinion gear when said clutch means is to be actuated to disengage said pinion gear,

whereby the rotational angular relationship between said coupling members and thereby the angular relationship between said combination actuating shaft and said dial is lixedly adjustable.

8. In a lock mechanism having enclosure means therefor including a lock case, apparatus comprising:

a combination operated mechanism assembly in said lock case,

a combination actuating shaft operatively coupled to said assembly, said assembly being operatively responsive to a predetermined program of sequential, angular rotational movements of said shaft;

a dial mounted exterior of the front of said enclosure for rotation coaxially of said combination actuating shaft;

coupling means in said enclosure drivingly interconnecting said dial and said combination actuating shaft, including;

a first coupling member fixed t0 said dial for coaxial rotation thereby,

a second coupling member fixed to said combination actuating shaft,

one of said coupling members comprising a coaxial drive gear,

and the other of said coupling members including a pinion gear rotatably supported thereby and making driving engagement with said drive gear;

clutch means actuatable selectively to engage and disengage said pinion gear for respectively preventing and permitting rotation of said pinion gear relative to said other of said coupling members;

an opening in said lock case, inaccessible from the front of said enclosure,

and means actuatable by adjusting means in'sertable through said opening into engagement with said pinion gear for such actuation of said clutch means and for such rotation of said pinion gear when said clutch means is thrus to be actuated to disengage said pinion gear;

whereby the rotational angular relationship between said coupling members and there'by between said combination actuating shaft and said dial is xedly adjustable.

9. In a lock mechanism having enclosure means therefor including a lock case, apparatus comprising:

a combination operated mechanism assembly in said lock case,

a combination actuating shaft operatively coupled to said assembly, said assembly being operatively responsive to a predetermined program of sequential, angular rotational movements of said shaft;

a dial mounted exterior of the front of said enclosure for rotation coaxially of said Icombination actuating shaft;

coupling means in said enclosure drivingly interconnecting said dial and said combination actuating shaft, including;

a first coupling member fixed to said dial for coaxial rotation thereby,

a second coupling member fixed to said combination actuating shaft,

one of said coupling members comprising a coaxial drive gear,

and the other of said coupling members including a pinion gear rotatably supported thereby and making driving engagement with said drive gear,

clutch means actuatable selectively to engage and disengage said pinion gear for respectively preventing and permitting rotation of said pinion gear relative to said other of said coupling members,

an opening in said lock case, inaccessible from the front of said enclosure, said opening and said pinion gear being positionable in substantially coaxial alignment with one another by rotation of one of said coupling members;

and means actuatable by adjusting means insertable through said opening into engagement with .said pinion gear for such actuation of said clutch means, and for such rotation of said pinion gear when said clutch means is thus to be actuated to disengage said pinion gear,

whereby the rotational angular relationship between said coupling members and thereby between said combination actuating shaft and said dial is fixedly adjustable.

10. In a l'ock mechanism having a case and a lock bolt extending therefrom for movement thereof between a first unlocking position and a second locking position, apparatus comprising:

a combination lock mechanism in said case having at least two separate combination elements mounted for separate manipulative movement relative to each other, said lock mechanism being actuatable by manipulation of said elements into simultaneous predetermined positions relative to each Iother and said case;

means for releasably locking said lock bolt in said second position and responsive to said actuation of said combination lock mechanism for releasing said lock bolt for movement from locking position to unlocking position;

and rotatable means operating automatically in response to movement of such released lock bolt from locking positions to unlocking position to impart movement to at least one of lsaid combination elements -relative to the other element;

thereby to disarrange said predetermined positions.

11. In a lock mechanism having a case and lock bolt extending therefrom for movement thereof between a first unlocking position and a second locking position, apparatus comprising:

a combination lock mechanism in said case having at least two separate combination discs mounted for separate manipulative rotation relative coaxially of each other, said lock mechanism being actuatable by manipulation of said discs into simultaneous predetermined angular positions relative to each other and said case;

4means for releasably locking said lock bolt in said second position and responsive to said actuation of said combination lock mechanism for releasing said lock bolt for movement from locking position to unlocking position;

and rotatable means operating automatically in response to movement of such released lock bolt from locking position to unlocking position to impart rotational movement to at least one of said combination discs relative to the other discs,

thereby to disarrange said predetermined angular positions.

12. In a lock mechanism having a case and a lock bolt extending therefrom for movement thereof between a first, unlocking position and a second locking position, apparatus comprising:

a combination lock mechanism in said case having at least two separate combination discs mounted for separate manipulative rotation coaxially of each other, said discs each having a gate notch formed in the -periphery thereof;

lever member in said case angularly mounted for pivotal movement thereof between a first position and a second position about a pivot means fixed therein;

blocker means movable by movement of said lever to said first angular position to lock said lock bolt in locking position and movable by movement of said lever to said second angular position to free said lock bolt for movement from locking position to unlocking position;

a gate dog member connected to said lever and movable, by pivotal movement of said lever to said first angular position, into riding contact with adjacent peripheries of said combination discs, thereby to position said lever member in said first angular position and to move into said gate notches therein when said combination discs are rotationally positioned such that all said gate notches are simultaneously in registry with said gate dog, thereby positioning said lever in said second angular position;

resilient fbias means constantly biasing said lever pivotally tow-ard said first and second angular positions;

rotatable means operating automatically in response to movement of such released lock bolt from locking position to unlocking position to pivot said lever member from said second angular position to said lfirst angular position thereof, in opposition to said bias means, thereby to remove said] gate dog from said gate notches and thereby to release said combination discs for rotation.

13. In a lock mechanism having a case and a lock bolt extending therefrom for movement thereof between a first, `unlocking position and a second locking position, apparatus comprising:

a combination lock mechanism in said case having at least two separate combination discs mounted for separate manipulative rotation coaxially of each other, lsaid discs each having a gate notch formed in the periphery thereof; lever member in said case angularly mounted for pivotal movement thereof between a first position and a second angular position about a pivot means fixed therein; blocker means movable :by movement of said lever to said first angular position to lock said lockbolt in said second position and movable hy movement of said lever to said second angular position to free said lock bolt for movement from locking position to unlocking position;

a gate dog member `connected to said lever and movable, by pivotal movement of said lever to said first angular position, into riding contact with adjacent peripheries of said combination discs, thereby to position said lever mem-ber in said first angular position and to move into said gate notches therein when said combination discs are rotationally positioned such that all said gate notches are simultaneously in registry with said gate dog, thereby positioning said lever in said record angular position;

resilient bias means constantly biasing said lever pivotally toward said first and second angular positions;

means responsive to movement of such released lock bolt from locking position to unlocking position to pivot said lever member from said second angular position to said yfirst angular position. thereof, in opposition to said bias means, thereby to remove said gate dog from said gate notches and thereby to release said combination discs for rotation;

and means, responsive to movement of such released lock bolt from locking position to unlocking position,

to impart rotational movement to at least one of said thus released combination dises, relative to said gate dog;

References Cited UNITED STATES PATENTS Gross 70-156 X 10 Monroe 292-450 X Craig 70-321 Triantalu 292-l50 X Brown 70-322 Pelle 70-156 Eilert et al. 70-133 X Check 70-315 X Davis 70-156 X Foster 292-150 X Richardson 70-133 Foote et al 70|-l56 MARVIN A. CHAMPION, Primary Examiner.

B. R. GAY,v Examiner.

P. TEITELBAUM, Assistant Examiner. 

